Winding-drum



i (No Model.) 2 Sheets-Sheet 1i.

J. M. GHATFIELD.

WINDING DRUM.

No. 436,824. Patented Sept. 23, 1890.

(No Model.)

2 Sheets-Sheet 2. J M. GHATPIELD.

WINDING DRUM.

Patented Sept. 28, 1890.

UNITED STATES PATENT OFFICE.

JAMES M. CHATFIELD, OF THOMASTON, CONNECTICUT.

WINDING-DRUM.

SPECIFICATION forming part of Letters Patent No. 436,824, datedSeptember 23, 18990.

Application filed April 4, 1890.

To all whom it may concern.-

Be it known that I, JAMES M. CHATFIELD, of Thomaston, in the county ofLitchfield and State of Connecticut, have invented new 1111 provementsin Winding-Drums; and I do hereby declare the following, when taken inconnection with accompanying drawings and the letters of referencemarked thereon, to be afull, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in

Figure 1, a View in side elevation of one form which a drum embodying myinvention may assume, together with automatic operating connections;Fig. 2, an enlarged view of the drum, in end elevation, showing itssections in their separated positions and the opcrating-pins of theshaft-head in section; Fig. 3, a similar view with the sections of thedrum in their closed or contracted positions; Fig. 4, a detached view,ininside elevation, of one of the shaft-dreads; Fig. 5, a view drawn tothe scale of Fig. 1, and showing the drum in end elevation from itsinner end with particular reference to a friction device forautomatically expanding the drum; Fig. 6, a View in transverse'sectionshowing the pawl-andratchet device for suddenly stopping the drum andautomatically contracting its sections; Fig. 7,a view of the drum invertical longitudinal section drawn to the scale of Fig. 1; Fig. 8, amodified construction which the drum may assume; Fig. 9, a diagramshowing one mode of plotting the slots in the plates attached to theends of the drum-sections.

My invention relates to an improvement in winding-drums, the objectbeing to adapt them to be contracted to relieve the material Wound uponthem, and thus permit it to be readily removed.

Further objects of myinvention are to produce adrum of the characterdescribed, which shall be simple, strong, and durable, and consist offew parts, and be automatic bothin its expanding and contracting action.

l/Vith these ends in View my invention consists in a winding-drum madein two or more longitudinal sections, a shaft, and connections betweenthe sections and shaft arranged on the basis of two circles differing indiameter by the distance representing the radial play of the sections.

Serial No. 346,556- (No model.)

My invention further consists in certain details of construction andcombinations of parts, as will be hereinafter described, and pointed outin the claims.

As herein shown, the drum is composed of two horizontal drum-sections Aand A, each a little less than a true semicircle in transverse section.Each end of these sections has rigidly secured to it a metallic plate B,exactly corresponding to it in transverse section and provided with twoslots C and C, respectively, of different length and pitch. The twoplates 13 B at each end of the drum will therefore present, in all, fourslots, the length,

sidered at another time.

Two disk-shaped shaft-heads D and D, each having an outwardly-projectinghub E, carrying a set-screw F, by which it is secured to the shaft G,are respectively located at the opposite ends of the drum-sections. Eachof these heads is provided with four inwardly projecting pins 11,arranged at the four corners of a square and entering the four slotspresented to them in the two adjacent plates of the drum-sections. Itwill be noted that each end of each section has two connections with theshaft, respectively, arranged on the basis of two circles of differentdiameter, and that the connections operate at a right angle to theshaft. The said pins communicate the motion of the shaft to thedrum-sections and also hold the same in place through the said plates,which, with the pins, compose the connections between the shaft anddrum-sections. The pitch, length, and relative arrangement of the saidslots determine the radial play to be ascribed to the drum-sections, andthat factor is employed in the con struction of two circles in which theslots are plotted.

the diagram forming Fig. 9 of the drawings. In that drawing the outercircle 01,, inbroken lines, represents the circumferenceof the pitch,and arrangement whereof will be con- One way of plotting the slots isshown by drum when the sections thereof are expanded,-

sponding exactly in size to a circle which, if

placed upon either of the shaft-heads, would pass through the center ofeach of its pins II. This circle (1 is then quartered by two diametricallines e 6, located at a right angle to each other, the points f, wherethe lines 'ee intersect the circle cl, locating the centers of the innerends of the four slots. In the expanded positions of the drum-sectionsthe pins will be located at the said ends of the slots, as shown by thesmall dotted circles g on the diagram. The circle h is now struck andmade larger than the circle 01 by the length of the line, whichrepresents the extreme radial play of the sections. .As shown by thedrawings, this distance is represented by the distance between thepoints 2' t" on the line j. The centers of the outer ends of the slots 00 fall in the circle h, and at points therein not strictly arbitrary,but determined in a measure by the pitch found to afford the bestresults and easiest operation in practice. The centersof the outer endsof the slotsO 0 having been established, they are employed inlocatingthe centers of the forward ends of the slots 0 O. The pins H beingstationary with reference to each other, it is apparent that when theshaft-head is rotated to throw the pins entered into the slots 0 C fromthe inner to the forward ends thereof the pins in the slots 0' C will bemoved the same distance forward. The distance between two adjacent pins,measured off from the centers of the forward ends of the slots 0 0, willtherefore give one line for determining the positions of the centers ofthe forward ends of the slots 0' O. \Vith compasses set to the distancebetwcen two adjacent pins, one leg is placedin the center of the forwardend of one of the slots 0 and the other end swept across the circles dand h, securing the line I. The centers of the inner ends of alliof theslots were located, as has been explained, in the circle d, which wasstruck from the point 0, representing the center of the shaft; but whenthe pins arein the outer ends of the slots the drum-sections arecontracted and the points 2' 2" are brought together and to the point C.With compasses set to the radius of the circle at, one leg is thereforeplaced on the point 71 and the other swept across the line Z, and thepoint m, where they intersect, will locate the center of the outer endofthe slot C of the drum-section A, the center of the forward end of theslot 0 of the drum-section A being determined from the point 2".

Under the described construction the two drum-sections will be held inposition by the pins H and the shaft permitted to rotate independentlyof them within the limits of the slots. When, however, the shaft isrotated in the direction of winding and the drumsections are retarded,either mechanically or by centrifugal action, the pins will seek theinner ends of the slots, which, being the nearest to the shaft, permitthe drum-sections to separateand reach the limit of their outward radialmovement, in which they are retained as long as the pins remain in theinner ends of the slots, from which direct radial pressure will notdislodge them, owing to the inclination of the slots to the lines inwhich such pressure is exerted, so that, although the sectionsbesubjected to strong pressure, while metal or other material is woundupon the drums, they will not collapse. other hand, the shaft orsections are rotated with respect to each other in the oppositedirection, which is that of unwinding, the pins will move to the outerends of the slots and draw the sections together, as shown by Fig. 3 ofthe drawings, whereby the actual circumference of the drum is reduced,so as to per pins mounted in heads at-tached to the shaft and platessecured to'the ends of the drum-- sections and slotted to receive the.pins,ldo

not limit myself to such connections between the drum-sections andshaft, as I may employ other connections built upon-thesameprinciple intheir stead.

Various devices may be used forautomatically expanding and contractingthe drumsections.

For an illustration of a device'for automatically expanding them, I haveherein shown-a frictional device consisting of a metallic bow I,encircling the inner end of the-drum and supported by a foot I, andhaving secured within it a leather strapJ, passed through a loop K atthe lower end of the bow, and having its upper ends secured tomovable-blocks L and .L', mounted upon the ends thereof and adjustablethereon for varying the tension of sections are heavy, centrifugal forcemaybe relied upon to automatically separate the drum-sections.

As an exampleof an automatic device for contracting the drum when it isstopped, I have shown a ratchet-wheel M, mounted on the shaft andengagedbya pawl N, connected through a slot 0 and pin 0 with the upperend of a lever P, the lower end whereof is provided with a pin P,entering a slot'Q',

formed in a horizontal lever Q',provided at one end with a pedal, whichis not shown, andhaving its other'end curved upwardand When, on thepivoted to a support R, and terminating in a shifting fork S, whichenters the groove formed in the shifting collar S of an ordinary clutchT. Under the described construction of ratchet and pawl and thecombination thereof with the clutch, the pawl N is thrown into positionto engage with the teeth of the ratchet M, just as soon as the power iscut off from the shaft G, whereby the said shaft will be abruptlystopped, without, however, stopping the sections A A of the drum, whichare not rigidly connected with it, and which will therefore be carriedforward by their inertia and drawn together by the action of the pins Din their slots 0 and O. The automatic contraction of the drum is thuseffected at the same time the shaft is stopped.

I would have it understood that I do not, however, limit myself to thesemeans for antomatically effecting the contraction of the drum.

As shown in Figs. 1 to 7, inclusive, of the drawings, the drum-sectionsare driven from both ends; but, if desired, they maybe driven only fromtheir inner ends, as shown by Fig. 8 of the drawings, in which theshaft-heads U and U are secured to the opposite ends of a hollow shaftV, rotating around a shaft W, the inner shaft-head U being adapted atits outer end to be engaged by a clutch X laterally movable on the shaftY.

It is not essential in carrying out my in vention that I should employthe means herein shown for connecting the ends of the drum-sections withthe shaft, whether that be solid or hollow, or whether they be drivenfrom one or both ends; but I shall adhere to the principle of connectingthe drunrsections and shaft on the basis of two circles, diifering indiameter by the distance to which the drum-sections are to be separatedwhen the drum is expanded; nor do I confine myself to any particularmeans for automatically expanding and "contracting the sections. I wouldtherefore have it understood that I do not limit myself to the exactconstruction shown and described, but hold myself at liberty to makesuch changes and alterations as fairly fall within the spirit and scopeof my invention.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. In a machine for winding sheet metal, the combination, with a shaft,of a winding drum composed of two or more longitudinal sections and twoconnections between each end of each section and the shaft, respectivelyarranged on the basis of two circles differing in diameter by the radialplay to be ascribed to the drum-sections, and constructed to operate ata right angle to the shaft, substantially as described.

2. In a machine for winding sheet metal, the combination, with a shaft,of a winding drum composed of two or more longitudinal sections and twoconnections between each end of each section and the shaft, respectivelyarranged on the basis of two circles, as described, and constructed tooperate at a right angle to the shaft, and means for automaticallyseparating the sections and bringing them together, substantially asdescribed.

3. In a machine for winding sheet metal, the combination, with a shaft,of a winding drum composed of two or more longitudinal sections, twoconnections between each end of each section and the shaft, respectivelyarranged on the basis of two circles, as described, and a frictiondevice for temporarily retarding the drum-sections when the shaft isstarted, substantially as described.

4-. In a machine for winding sheet metal, the combination, with a shaft,of a windingdrum composed of two or more longitudinal sections, twoconnections between each end -of each sect-ion and the shaft,respectively arranged on the basis of two circles, as described, and adevice for abruptly stopping the shaft, whereby the drum-sections whichare not rigidly connected with it will be thrown forward by inertia anddrawn together, substantially as described.

5. In a machine for winding sheet metal, the combination, with a shaft,of a winding drum composed of two drum sections, each less than asemicircle in transverse section, a plate secured to each end of eachsection and conforming in shape thereto and provided with two slots,respectively pitched on the basis of circles differing in diameter bythe radial play to be ascribed to the sections, and two shaft-headsmounted upon the shaft at opposite ends of the drum, and each havingfour rigid inwardly-projecting pins arranged to enter the four slotspresented by the two plates on the adjacent sides of the sections andlocated at the four corners of a square, whereby when the shaft orsections are moved the pins will be shifted in the slots and thesections moved apart or drawn together, substantially as described.

JAMES M. CHATFIELD.

Witnesses:

D. S. PLUME, J. S. EASTWOOD.

ICC

